I have some ugly bruises on my 2001 cupra side doors .
Looks like leaks from under side mirrors , which appears to be more and more after every car wash.
Did you meet similar issue with your cars ?
I live in Poland . Do we have hard water here ? Might be true
These marks looks like leaks from aluminium which got coroded (oxidation ? ) inside the mirrors.
Driver's mirror got coroded so badly that virtually fell off
Handwash or touchless car wash . They do blow compressed air to dry the mirrors out.
But why this aluminium frame inside mirrors got coroded so badly ?
One day mirror wasn't folding anymore , few weeks later it just fell off.
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